That's pretty ... never would have thought of using a curtain and curtain rod on the outside of your shower curtain!
70 in x 72 in Space Canvas Fabric Shower Curtain Polka Dot Teal Blue Brown Olive…
Chocolate Brown Shower Curtain and 3 Pc Window Curtain Set: Bathroom Decor Set, Double Layer, Floral Embroidery - Bathroom And More
http://www.motorhomepartsandaccessories.com/motorhomeshowercurtains.php has a list of some shower curtains that can be installed in any recreational vehicle.
tan and light brown shower curtains - Google Search
blue and brown bathroom | ... Bath Shower Curtain and Bath Rug Set: DB15D-530: Diamond Blue-Brown
Stripe Border Shower Curtain - Stone White/Platinum #westelm
drop in tub shower curtain - Google Search
Vintage Ticking Stripe Shower Curtain with Ruffles - 72x72 IN STOCK Black, Gray, Navy, Brown, other colors and sizes available MTO by ModernFolkShop on Etsy https://www.etsy.com/listing/166131337/vintage-ticking-stripe-shower-curtain